Archaeologists are still unraveling the secrets of the brutal massacre that wiped out this ancient fort.

Nestled amid the peaks and lochs of the Scottish Highlands, this inn and pub has played host to outlaws and ghosts.

The housing complex served as an anti-fascist fortress during the Austrian Civil War.

These former Nazi anti-aircraft towers offer a singular view of the north of Berlin in the summer, and a sanctuary for bats in winter.

This historic pub has maintained much of its 1906 decor, including a small sequestered room for women, where orders were slipped through a tiny window.

A 12th-century church with a medieval fresco and an intriguing “Greek runestone.”

This Bronze Age man spent millennia buried in a mine, giving his bones an eerie hue.

This 17th-century pub once had a hole in its wall so the neighboring blacksmith could easily access beer.

Scotland still bears an enormous scar of its Roman past.

Thousand-year-old Viking runes adorn an ancient Greek lion at the entrance to the Venetian Arsenal.

A star-shaped fortress town fort built in the geometric model of the Renaissance utopian city.

An abandoned 17th-century baroque hunting lodge with a wonderfully strange architectural plan.

Spend the night in this formerly abandoned traditional Scottish village.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

An otherworldly alpine pasture with its own unique microculture that recalls Middle Earth.

Ruins of a 13th-century fortress perched above a breathtaking Mediterranean bay.

This mysterious, medieval cathedral remains unbuilt but fiercely protected.

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

Each spring this woodland floor is carpeted with purplish flowers as far as the eye can see.

This 700-year-old structure is one of the most unique architectural and historic monuments in Gdańsk.

One of the cave cities of Crimea, built by the Goths in the sixth century.

A patchwork of ruins from various civilizations in one of the world's oldest continually inhabited cities.

A 19th-century funicular railway shuttles visitors up this surprising sea cliff to one of the world's largest camera obscuras.

In Kazakhstan, a colorful cathedral with many lives once survived the most powerful earthquake in the region.